He made the comment online to a Muslim student who had criticized Donald Trump’s presidency and spoke about freedom and diversity. Adams wrote "how dare" she complain.

"Muslim females are safer in America than in any Middle Eastern country. How dare you complain while enjoying our protection!" – Prof. Clifford Adams

Adams didn’t respond immediately Friday to a request for comment. He earlier wrote a letter to The Enquirer saying he was "deeply sorry" and was trying to have a "lively, provocative, scholarly argument."

School spokesman Greg Vehr says the university is "committed to excellence and diversity."